无法获得在IE11上运行的jhipster(6.3.1)生成的应用程序 [英] Can't get jhipster (6.3.1) generated application running on IE11

问题描述

我试图在IE 11中运行我的JHipster 6.3.1生成的应用程序，但继续出现一个错误.根据我在polyfill.ts中使用的导入方式，我会得到从符号"未定义"到普通的语法错误"的信息，有时甚至根本没有特定的错误，只有带有通用JHipster的页面

I'm trying to get my JHipster 6.3.1 generated application running in IE 11 but keep on getting one error after another. Depending on which imports I use in polyfill.ts I get anything from 'Symbol' is undefined" to a plain "Syntax error" and sometimes no particular error at all, just a page with the generic JHipster

发生错误:-(

An error has occurred :-(

我尝试了polyfills和tsconfig.json设置的不同组合.我已经按照角度8文档安装了推荐的polyfills，但是对于所有与IE11有关的纯angular 8文档，似乎jhipsters angular != standard angular都无济于事.

I've tried different combinations of polyfills and tsconfig.json settings. I've installed the recommended polyfills as per angular 8 docs, but it seems that jhipsters angular != standard angular as all pure angular 8 documentation regarding IE11 were unhelpful.

我知道JHipster不再支持IE 11，但是由于Angular对于使用polyfills和差分加载使其工作具有特定的说明，我希望(假设)这将是一个相当简单的解决方法.

I know IE 11 is not supported anymore by JHipster, but since Angular has specific instructions on using polyfills and differential loading to get it working, I expected (assumed) it would be a fairly straight forward fix.

推荐答案

正如我所说的

As I said here, I managed to do it the following way.

首先，添加以下package.json依赖项:@babel/core，@babel/preset-env和babel-loader:

First, add those package.json dependencies: @babel/core, @babel/preset-env and babel-loader:

yarn add @babel/core @babel/preset-env babel-loader --exact --dev

(已测试以下版本:

    "@babel/core": "7.6.4",
    "@babel/preset-env": "7.6.3",
    "babel-loader": "8.0.6",

)

现在在src/main/webapp/app/polyfills.ts的顶部添加以下行:

Now add the following lines at the top of src/main/webapp/app/polyfills.ts:

import 'core-js/stable';
import 'regenerator-runtime/runtime';

在webpack/webpack.common.js之后

            {
                test: /manifest.webapp$/,
                loader: 'file-loader',
                options: {
                    name: 'manifest.webapp'
                }
            },

添加以下几行:

            {
                test: /\.js/,
                use: {
                  loader: 'babel-loader',
                  options: {
                    "presets": [
                      [
                        "@babel/preset-env",
                        {
                          "targets": {
                            "firefox": "60",
                            "ie": "11"
                          },
                          "useBuiltIns": "entry",
                          "corejs": 3
                        }
                      ]
                    ]
                  }
                },
                exclude: /@babel(?:\/|\\{1,2})runtime|core-js/,
              },

最后，在tsconfig.json&中将target更改为es5. tsconfig-aot.json.

And finally, change target to es5 in tsconfig.json & tsconfig-aot.json.

这是我的完整测试:

sudo rm -rf /dev/shm/myproject
cd /dev/shm/
mkdir myproject
cd myproject
mkdir /dev/shm/m2cache /dev/shm/yarncache
sudo tee myproject.jdl <<EOF
application {
    config {
        baseName MyProject
        clientPackageManager yarn
        jhiPrefix mp
        enableTranslation false
        languages [fr]
        nativeLanguage fr
        packageName com.mycompany.myproject
        prodDatabaseType postgresql
        skipUserManagement true
    }
    entities *
}

entity MyEntity {
    label String
}
EOF
JHIPSTER_VERSION=v6.3.1
sudo chown -R 1000:1000 . /dev/shm/m2cache /dev/shm/yarncache
docker run -it --rm --name jhipster -v "$(pwd):/home/jhipster/app" -v /dev/shm/m2cache:/home/jhipster/.m2 -v /dev/shm/yarncache:/home/jhipster/.cache/yarn -v "$HOME/.gitconfig:/home/jhipster/.gitconfig:ro" jhipster/jhipster:$JHIPSTER_VERSION jhipster import-jdl ./myproject.jdl --force

# WAIT FOR THE APPLICATION TO BE GENERATED

docker run -it --rm --name jhipster -v "$(pwd):/home/jhipster/app" -v /dev/shm/m2cache:/home/jhipster/.m2 -v /dev/shm/yarncache:/home/jhipster/.cache/yarn -p 9000:9000 -p 8080:8080 jhipster/jhipster:$JHIPSTER_VERSION yarn add @babel/core @babel/preset-env babel-loader --exact --dev

# WAIT FOR THE YARN COMMAND TO END

echo "
import 'core-js/stable';
import 'regenerator-runtime/runtime';

$(cat src/main/webapp/app/polyfills.ts)
" | sudo -u '#1000' tee src/main/webapp/app/polyfills.ts

cat > /dev/shm/webpack.patch <<EOF
            {
                test: /\.js/,
                use: {
                  loader: 'babel-loader',
                  options: {
                    "presets": [
                      [
                        "@babel/preset-env",
                        {
                          "targets": {
                            "firefox": "60",
                            "ie": "11"
                          },
                          "useBuiltIns": "entry",
                          "corejs": 3
                        }
                      ]
                    ]
                  }
                },
                exclude: /@babel(?:\/|\\{1,2})runtime|core-js/,
            },
EOF
sudo -u '#1000' sed -i $'/Ignore warnings about System.import in Angular/{e cat /dev/shm/webpack.patch\n}' webpack/webpack.common.js

for FILE in tsconfig.json tsconfig-aot.json; do
  sudo -u '#1000' sed -i 's/"target": "es6"/"target": "es5"/' $FILE
done

docker run -it --rm --name jhipster -v "$(pwd):/home/jhipster/app" -v /dev/shm/m2cache:/home/jhipster/.m2 -v /dev/shm/yarncache:/home/jhipster/.cache/yarn -p 9000:9000 -p 8080:8080 jhipster/jhipster:$JHIPSTER_VERSION bash -c "./mvnw & yarn start --host 0.0.0.0"

感谢 https://www.thebasement.be/-babel-7-and-webpack/， https://babeljs.io /docs/en/usage 和 https://github .com/zloirock/core-js/issues/514#issuecomment-523524472 获取提示！

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